Theme 3

Teeth, dental arches, bite. Description of orthognatic bite (signs of all dental arch, frontal teeth, lateral teeth). Physiological types of orthognatic bite.

1. Distinguish the crown of the tooth (2 answers):

A)* anatomic;

B) *clinical;

C) biological;

D) physiological;

2. The upper dental arch of the permanent teeth has a form of:

A) *semiellipse;

B) parabola;

C) trapezoid;

D) semicircle;

3. The lower dental arch of the permanent teeth has a form of:

A) *parabola;

B) semiellipse;

C) trapezium;

D) semicircle

4. What is the relation of dental arches?

A) *upper is wider than lower;

B) lower is wider than upper;

C) identical;

D) right side of upper is wider;

5. Unity of dental row is NOT provided by:

A) *masticatory muscles;

B) interdental contacts;

C) alveolar process;

D) parodontium;

6. There is NO such curve in prosthetic dentistry:

A) *parodontal;

B) apical;

C) alveolar;

D) dental;

7. The occlusal surface of dental arches is:

A) *surface which passes through masticatory cusps and cutting edges of teeth;

B) surface which passes only through the masticatory cusps of teeth;

C) plane which passes from the buccal cusp of first premolar to the distal buccal cusp of third molar;

D) surface which passes only through cutting edges of teeth;

8. Closing of teeth - is:

A) *occlusion;

B) central occlusion;

C) bite;

D) cusp-fissure contact;

9. There are such structures of occlusal surface as:

A. *tops and slopes of cusps, central fossa and fissures between cusps, marginal ridges.

B. abutment cusps, central fossa and fissures between cusps, marginal ridges.

C. cusp of teeth, marginal ridges, central fossa and fissures between cusps.

10. In anterior occlusion:

A. *condyles drift forward and locate at a top of articular eminence

B. condyles drift backward and locate at a base of articular eminence

C. condyles drift to the right and locate at a base of articular eminence

D. condyles drift to the left and locate at a base of articular eminence slightly rotating

11. Lateral occlusion occurs when:

A. *translational motions of mandible to the left or to the right

B. motion of mandible backward

C. motion of mandible forward

D. blocking of mandible

12. Bite is:

A. *type of teeth contacts in central occlusion

B. type of teeth contacts in frontal occlusion

C. type of teeth contacts in lateral right occlusion

D. type of teeth contacts in lateral left occlusion

13. Non physiological bite is:

A. *Deep bite

B. Direct bite

C. Orthognathic bite

D. Opisthognathic bite

E. Physiological prognathic bite

14. Non pathological bite is:

A. *direct bite

B. progenic bite

C. prognathic bite

D. deep bite

E. cross-bite

15. Cusp-to-cutting edge contact is :

A. *cutting edges of lower frontal teeth contact with cusps of upper teeth

B. cutting edges of upper frontal teeth contacts with lower teeth cusps

C. lower and upper frontal teeth contact by cutting edges

D. lower and upper frontal teeth contact only by their cusps

16. Direct bite is:

A. *cutting edges of upper frontal teeth don’t overlap the same lower teeth – they contact edge-to-edge

B. cutting edges of upper frontal teeth overlap the same lower teeth

C. cutting edges of lower frontal teeth overlap the same upper teeth

D. only lateral teeth have contacts

17. Prognathic bite is:

A. *protruded position of upper jaw

B. protruded position of lower jaw

C. deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

D. disocclusion of frontal teeth and contacts between molars

18. Progenic bite is:

A. *protruded position of lower jaw

B. protruded position of upper jaw

C. deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

D. disocclusion of frontal teeth and contacts between molars

19. Open bite is:

A. *disocclusion of frontal teeth and contacts between molars

B. protruded position of upper jaw

C. deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

D. protruded position of lower jaw

20. Deep bite is:

A. *deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

B. protruded position of upper jaw

C. protruded position of lower jaw

D. disocclusion of frontal teeth and contacts between molars

THEME 4

Temporomandibular joint (TMJ). Structure, main elements. Connecting of TMJ with the scull. Types of joints (rodent, predator, ruminant). Correlation between shape and function of TMJ. Articulation and occlusion. Biomechanics of mandibular movements (vertical, sagittal, transversal movements).

1. What is the motion of lower jaw, at which both condyles simultaneously displaced forward, named?

A) *protrusion;

B) laterotrusion;

C) mediotrusion;

D) occlusion;

E) bruxism.

2. What is the motion of lower jaw, at which it deviates outward from a central sagittal plane, named?

A) *laterotrusion;

B) protrusion;

C) mediotrusion;

D) occlusion;

E) bruxism.

3. What is the motion of lower jaw, at which it moves to the central sagittal plane, named?

A) *protrusion;

B) laterotrusion;

C) mediotrusion;

D) occlusion;

E) bruxism.

4. What is the way of lower incisors on the palatal surface of upper incisors at motion of lower jaw from central occlusion into anterior named?

A) *sagittal incisor path;

B) lateral incisor path;

C) sagittal articular path;

D) lateral articular path;

E) motion of Bennett.

5. The size of sagittal incisor path angle is:

A) *40° - 50°;

B) 15° - 17°;

C) 20° -40°;

D) 100° - 110°;

E) 120° – 130°.

6. What is the distance, which a condyle passes at the protrusion of lower jaw, named?

A) *sagittal articular path;

B) lateral articular path;

C) motion of Bennett;

D) transversal incisor path;

E) sagittal incisor path.

7. The size of sagittal articular path angle is:

A) *20° - 40°

B) 10° - 20°

C) 40° - 50°

D) 50° - 70°

E) 100° - 110°

8. Condyles location in central occlusion:

A) *at foundation of articular prominence;

B) at foundation of articular prominence, upper and backward;

C) on the top of articular prominence;

D) on the slope of articular prominence;

E) at the base of articular prominence.

9. Articular heads in position of anterior occlusion locate:

A) *locate on the top of articular prominence or near-by it;

B) at foundation of articular prominence;

C) at foundation of articular prominence, upper and backward;

D) locate on the slope of articular prominence;

E) at foundation of articular prominence, displaced inward;

10. At the transversal moving of lower jaw an articular head on the side of contracted lateral pterygoid muscle is:

A) *moving downward, forward and inward;

B) moving downward and forward;

C) moving downward;

D) moving downward and inward;

E) remains at foundation of articular tubercle.

11. At the transversal motion of lower jaw an articular head of the opposite side a lower jaw moves in is:

A) *remains at foundation of articular prominence;

B) moving downward, forward and inward;

C) moving downward and inward;

D) moving downward;

E) moving downward and forward;

12. What is the occlusal curve, passing from incisors to the distal cusps of third molar named?

A) *sagittal curve;

B) transversal curve;

C) horizontal curve;

D) vertical curve;

E) parasagittal curve;

13. What is the occlusal curve, passing through the masticatory surfaces of right and left molars in lateral direction named?

A) *transversal;

B) sagittal;

C) vertical;

D) horizontal;

E) parasagittal.

14. Closing of dental arches or separate groups of opposite teeth is:

A) *occlusion;

B) articulation;

C) rotation;

D) contraction;

E) bruxism;

15. Closing of dental arches with maximal intercuspation is:

A) *central occlusion;

B) anterior occlusion;

C) lateral occlusion(right);

D) lateral occlusion (left);

E) posterior occlusion;

16. What is the relation between dental arches in central occlusion named?

A) *bite;

B) mediotrusion;

C) protrusion;

D) laterotrusion;

E) bruxism.

17. What do the cuttings edges of frontal teeth and masticatory surfaces of molars and premolars form?

A) *occlusal plane;

B) occlusal surface;

C) lingual surface;

D) palatal surface;

E) labial surface.

18. What is the dental arch shape of maxilla?

A)*ellipsoid;

B) paraboloid;

C) sinewave;

D) tangential;

E) cosinusoid.

19. What is the shape of lower dental arch?

A) *paraboloid.

B) sinewave;

C) tangential;

D) cosinusoid;

E) ellipsoid;

20. What are the anatomic peculiarities of TMJ structure (mark two answers):

A) *incongruence;

B) *presence of articular disk;

C) absence of articular disk;

D) absence of articular prominence;

E) absence of joint space .

21. Which muscles trace condyle and disk upward?

A) *temporalis, masseter, medial pterygoid.

B) masseter, temporalis, lateral pterygoid

C) medial pterygoid, lateral pterygoid, temporalis

D) medial pterygoid, temporalis

22. Which muscle traces condyle forward?

A) *inferior lateral pterygoid

B) temporalis

C) medial pterygoid

D) superior lateral pterygoid

E) masseter